.main {
    margin: 10px auto;
    padding: 20px;
    background: #eee;
    width: 600px;
    zoom: 1;
}
.main table {
    background: #ccc;
    float: left;
}

.main table td {
    border: 2px outset #eee;
    font-size: 20px;
    width: 32px;
    height: 32px;
    text-align: center;
    cursor: pointer;
}

.main table td:hover {
    background-color: #aaa;
}
.main #operation {
    width: 180px;
    float: right;
    text-align: center;
}

/*地雷背景*/
.landMine {
    background-image: url("https://labfile.oss.aliyuncs.com/courses/144/mine.png");
    background-position: center;
    background-repeat: no-repeat;
}

.main table td.normal {
    border: 2px solid #eee;
    background-color: #aaa;
}

.main table td.normal:hover {
    background-color: #aaa;
}

/*旗子背景*/
.flag {
    background-image: url("https://labfile.oss.aliyuncs.com/courses/144/flag.png");
    background-position: center;
    background-repeat: no-repeat;
}

.main:after {
    clear: both;
    display: block;
    content: "";
    line-height: 0;
    height: 0;
    visibility: hidden;
}
.main .tip {
    font-size: 14px;
    margin: 5px;
}

.main .tip ul {
}

.main .tip ul li {
    margin: 5px 0;
    line-height: 20px;
}
.main .light {
    font-size: 30px;
}
.main .red {
    color: red;
}
.main .f60 {
    color: #f60;
}
.main input[type="button"] {
    padding: 2px 10px;
    margin: 5px;
    font-size: 20px;
    cursor: pointer;
}
.main .txtleft {
    text-align: left;
}

.main input[type="radio"],
.main fieldset label {
    cursor: pointer;
}

.main fieldset {
    margin: 10px 0;
    line-height: 25px;
}